1. Tardigrade
  2. Question
  3. Biology
  4. The part of the sarcomere in which only myosin is present is termed as:

Q. The part of the sarcomere in which only myosin is present is termed as:

 431  174 NTA AbhyasNTA Abhyas 2022 Report Error

Solution:

I-band or Isotropic band or Light band: It contains actin.
A-band or Anisotropic band or Dark band: It contains myosin.
Z-line: It is an elastic fibre which passes through the centre of each I band and bisects it.
M line: It is a thin fibrous membrane which passes through the centre of each A band.
Sarcomere: It is the part of the myofibril between two successive Z lines. It is also considered as the functional unit of contraction.
H-zone: In a resting state, the ends of thin filaments on either side of the thick filaments partially overlap the free ends of the thick filaments, leaving the central part of the thick filaments. This central part of thick filament is not overlapped by thin filaments and is termed as H zone.